Merge pull request #163 from Divyanshu-s13/fix/404-redirect-event-handler

Thanks @Divyanshu-s13 for the update

Author: vanderaj

404.html

@@ -17,9 +17,9 @@
 </style>
 
 <script type="text/javascript">
-document.onload = function() {
+window.addEventListener('load', function() {
   document.location.replace("https://www.owasp.org");
-}
+});
 </script>
 
 <div class="container">